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#CREAT USB BOOT FOR MAC INSTALL#
#CREAT USB BOOT FOR MAC PASSWORD#
#CREAT USB BOOT FOR MAC MAC#

Encryption is up to you, although external disks don’t benefit from the hardware encryption provided to internal SSDs by T2 or M1 chips.Īvoid naming the volume Macintosh HD, which would normally coincide with your internal storage. If you prefer, and are sure that everything will cope, you can use APFS Case-Sensitive if you prefer. Normally, you should choose to format it in APFS but not Case-Sensitive, for greatest compatibility with software.

#CREAT USB BOOT FOR MAC INSTALL#

You don’t and can’t do that on an M1 Mac: this only applies to Intel Macs with T2 chips.Īlthough you can do this immediately before you install macOS onto it, it’s usually better if you connect the external disk now, open Disk Utility, and format it ready for the installation.

#CREAT USB BOOT FOR MAC MAC#

To do that, restart in Recovery mode (Command-R), open Startup Security Utility and enable your Mac to boot from external media. If you’re using an Intel Mac with a T2 chip, you first need to check that your Mac is configured so that it can boot from an external disk, unless of course you already know that because that’s what it’s doing now.

You can now quit Terminal and eject the volume.As Apple doesn’t yet appear to provide complete instructions for the creation of a bootable external disk in recent versions of macOS, and the information which it does provide is at best misleading in places, this article attempts to remedy this for both Intel and M1 Macs.

When Terminal says that it's been completed, the volume will have the same name as the installer you downloaded, such as Install macOS Big Sur.

After the volume has been erased, you may see an alert stating that Terminal would like to access files on a removable volume.

Terminal shows the progress as the volume is erased.

When prompted, type Y to confirm that you want to erase the volume, then press Return.

Terminal doesn't show any characters as you type your password.

#CREAT USB BOOT FOR MAC PASSWORD#

When prompted, type your administrator password and press Return again.

* If your Mac is using macOS Sierra or earlier, include the -applicationpath argument and installer path, similar to the way this is done in the command for El Capitan. Sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/ MyVolume -applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app Sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/ MyVolume

Sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia -volume /Volumes/ MyVolume Sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia -volume /Volumes/ MyVolume Sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia -volume /Volumes/ MyVolume If it has a different name, replace MyVolume in these commands with the name of your volume. These assume that the installer is in your Applications folder and MyVolume is the name of the USB flash drive or other volume you're using.

Type or paste one of the following commands in Terminal.

Open Terminal, which is in the Utilities folder of your Applications folder.

Connect the USB flash drive or other volume that you're using for the bootable installer.